How Do You Develop An IP Address Scheme?

When building out a surveillance/security network, how do you choose IP address scheme?

Specifically, how do you decide which devices occupy which range, e.g.:

  • Default gateway: 172.16.20.1
  • Servers: 172.16.21.1-5
  • Switches: 172.16.21.30-35
  • Cameras: 172.16.22.1-?
  • Access control: 172.16.30.1-?

And so on. We have planned smaller Class C networks in the past and ended up running out of addresses in specific ranges when we added more cameras, servers, and switches than expected, and needing to change subnet masks later. So we are moving to a Class B network now and want to organize properly from the start.

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